电梯井口除设置固定的栅门外,还应在电梯井内每隔()层设一道安全平网。 一。 二。 三。 四。
气瓶瓶体封闭端的非筒体承压部分是() 瓶颈。 瓶口。 瓶底。 瓶肩。
自保险合同订立起就不发生法律效力的均无效保险合同属于() 相对无效保险合同。 条件无效保险合同。 绝对无效保险合同。 法定无效保险合同。
After you have restored and recovered a database to a new host by using a previously performed Recovery Manager (RMAN) backup, which is the best option you would consider for the new database?() Opening the database in RESTRICTED mode。 Opening the database with the RESETLOGS option。 Setting a new DBID for the newly restored database。 Restoring the server parameter file (SPFILE) to the new host。
卫星城从发生根源上看属于()。 飞地型城市化。 他力型城市化。 自力型城市化。 外延型城市化。
A system administrator wants to NFS mount a filesystem from server "Alpha" to server "Bravo." Which command should be issued from "Bravo" to determine which filesystems are being exported by server "Alpha"? ()